A trademark for Pokken Tournament was registered in Europe 2 days ago (August 18, 2015).
For now there isn't any information if the game will be an arcade version or a porting for Wii U and the trademark holder is the Pokémon Company.

The official website updated with the new official poster and a new trailer that shows the green blob.
The 4th episode of Pocket Monsters XY Special Episode: The Strongest Mega Evolution ~Act IV~ (ポケットモンスターXY特別編 最強メガシンカ～Act IV～ | Pocket Monsters XY:...

The official Pokémon YouTube channel announced a new distribution for North America.
A Shiny Rayquaza will be available starting from today until September 14, 2015 for Pokémon Omega Ruby and Alpha Sapphire.
This Rayquaza knows the following moves:...

The first images of CoroCoro revealed some new images of the green Pokémon revealed at the end of the new movie, The Archdjinni of the Rings: Hoopa and confirmed that Zygarde will appear in the upcoming Mega Evolution Act 4.